Yamaha EF2000iSv2, 1600 Running Watts/2000 Starting Watts, Gas Powered Portable Inverter 1600 watt rated AC output, 2000 watt maximum AC output, 13.3/16.7 amps @ 120V Super-quiet muffler with USFS-approved spark arrestor - 51.5 dBA at 1/4 load Smart Throttle varies engine speed based on load - improves fuel economy and reduces noise Inverter system with Pulse Width Modulation (PWM) control CARB Compliant